Is there a good profiler for javascript? I know that firebug has some support for profiling code. But I want to determine stats on a longer scale.
Imagine you are building a lot of javascript code and you want to determine what are actually the bottlenecks in the code. At first I want to see profile stats of every javascript function and execution time. Next would be including DOM functions. This combined with actions that slows things down like operation on the rendering tree would be perfect. I think this would give a good impression if the performance is killed in my code, in DOM preparation or in updates to the rendering tree/visual.

Is there something close to what I want? Or what would be the best tool to achieve the most of what I've described? Would it be a self compiled browser plus javascript engine enhanced by profile functionality?

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Blackbird

I wrote that I know firefox. I want to have more stats from the browser that is influenting the execution of the javascript.
– Norbert HartlMay 12 '09 at 22:13

1

Ditto on Firebug, and you can profile straight from the console if you don't want to code it.
– Chris BMay 12 '09 at 22:14

1

Firebug is just about the best tool you'll get.
– Sasha ChedygovMay 12 '09 at 22:34

1

Same thing works in the Safari Web Inspector
– olliejMay 14 '09 at 20:13

8

Firebug is good and all, but I can't believe there are so many people here chanting "Firebug, Firebug!" right after the OP said explicitly that he wants to profile his code from multiple browsers.
– JMTylerNov 30 '12 at 20:05